Equilibrium



(NoModeL) G. KELLY.

EQUILIBRIUM APPLIANCE FOR ROCKING CHAIRS.

No. 379,472. Patented Mar. 13,1888.

ATTEST: INVENTOR:

N PKTERS, Fhalo-Ijlhagnphen Wanhingiun. a. c.

UNITED STATES PATENT Orrice. I

EQUILIBRIUM APPLIANC SPECIFICATION forming part of Letters Application filed October 18, 1887. Serial No. 252,743.

E FOR ROCKING-CHAIRS.

Patent No. 379,472, dated March 13, 1888.

(No model.)

To all whom it may concern:

Be it known that I, GEORGE KELLY, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improved Equilibrium Appliance for Rocking-Ohairs and Like Articles; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being bad tothe accompanying drawings, forminga part of this specification.

This invention relates to that class of household and other articles, such as rocking-chairs, swings, and similar exercising and comfort giving articles; and the object of the present improvementis to provide an improved equilibrium or equalizing attachment for use in connection with the aforesaid articles, so as to render the swingingor rocking motion of the same constant, uniform, and light-running. I attain such object by the mechanism illustrated in the accompanying drawings, in

which v Figure 1 is a side elevation of an ordinary rocking-chair to which my improved appliance is attached; Fig. 2, a detail side view of a rocking-chair illustrating a modified form of myimprovement; Fig. 8, a detail section of a modified form of my improved appliance; and Fig. 4, a detail elevation, illustrating'the adaptation of myimprovement to a platform rocking-chair.

Similar letters of reference indicate like parts in the several views.

As represented in the drawings, my improved equilibrium or equalizing device consists of a horizontally-arranged track tube or box, A, containing a shifting body or weight, B, which shifts from end to end of the box or track as the same is swung out of a horizontal plane.

The shifting body or Weight may be in the form ofa body of mercury or other fluid, as indicated in Figs. 1, 2, and 4, or that ofa globe, as indicated in Fig. 3. In the latter case the track-tube A will be provided with cushionsprings G, of any well-known form, at each end,

and assist in impartinga return movement to the same. p

The form of the track tube or box A may be either straight, as shown in Figs. 1 and 2, or

to receive the impact of the globe or ball ofa curved form, as shown in Fig. 4., as the circumstances or special use of the device may i suggest. I

In case where a very long track tube or box A is required I prefer to form the bottom of the same inclined upward from each end to the center, (see Fig. 3,) and provide in connection therewith a duplicate arrangement, B of the shifting weight or balls, as indicated in Fig. 3, which act respectively to and from the middle of the track or tube, and not from end to end of the same, as hereinbefore described.

My improved device is intended for attachfixedly, as indicated in Fig. 1, or capable ofa slight horizontal movement in guides, as indicated in Fig. 2; or it may be arranged in or form one or both of the rockers G of the chair, as indicated in Fig. 4, such arrangement being specially adapted to platform rocking chairs; and with such application it is preferred to use cushion-springs -D, attached at either or both ends of the platform D, and adapted to bear under the endor ends of such rocker to assist in rendering the movement more regular and uniform.

When used in connection with an ordinary rocking-chair, I find the action of my improved appliance is greatly improved by providing means for supporting the feet of the occupant away from the floor, and this I accomplish by extending the forward part of the rockers outward and attaching thereto a foot-rest, F, as indicated in Fig. 1.

My improvement, while herein described and illustrated as being specially applicable to rocking-chairs, is equally applicable to any comfort-giving article having a rocking or swinging motion, such as cradles, &c., and may be so applied without departing from the spirit of my invention.

I make no broad claim in this application .to the construction of the equalizing device herein described other than the special applications and combinations herein set forth, such appliance in its other applications being embodied in a separate application filed herewith.

Having thus fully what I claim as new, Letters Patent, is-

described my invention, and desire to secure by ment to the side of a rocking-chair, either 1. The combination, of an equalizing device track containing a shi with a rockingchair, consisting of a tube or fting weight or body,

essentially as herein described.

2. The combination,

having a footrest, F, of

with a rocking-chair; an equalizing device consisting of a tube or track containing a shifting weight or body, scribed.

3. The combination, of a platform,

D, equalizing device AB, conessentially as herein dewith a rocking-chair,

sisting of a tube or track containing ashifting body or weight, and a spring or springs ar-- ranged under the end or ends of the tube or track A, essentially as herein described.

In testimony whereof witness my hand this 10th day of August, 1887.

GEORGE KELLY. In presence of- ROBERT BURNS, M. H. HOLMES, 

